<head>
  <style> body { margin: 0; } </style>

  <script src="//unpkg.com/force-graph"></script>
  <!--<script src="../../dist/force-graph.js"></script>-->
</head>

<body>
  <div id="graph"></div>

  <script>
    const imgs = ['cat.jpg', 'dog.jpg', 'eagle.jpg', 'elephant.jpg', 'grasshopper.jpg', 'octopus.jpg', 'owl.jpg', 'panda.jpg', 'squirrel.jpg', 'tiger.jpg', 'whale.jpg']
      .map(src => {
        const img = new Image();
        img.src = `./imgs/${src}`;
        return img;
      });

    // Random connected graph
    const gData = {
      nodes: imgs.map((img, id) => ({ id, img })),
      links: [...Array(imgs.length).keys()]
        .filter(id => id)
        .map(id => ({
          source: id,
          target: Math.round(Math.random() * (id-1))
        }))
    };

    const Graph = new ForceGraph(document.getElementById('graph'))
      .nodeCanvasObject(({ img, x, y }, ctx) => {
        const size = 12;
        ctx.drawImage(img, x - size / 2, y - size / 2, size, size);
      })
      .nodePointerAreaPaint((node, color, ctx) => {
        const size = 12;
        ctx.fillStyle = color;
        ctx.fillRect(node.x - size / 2, node.y - size / 2, size, size); // draw square as pointer trap
      })
      .graphData(gData);
  </script>
</body>